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SELECT 
  1 
FROM 
  ushop_lock_keys 
WHERE 
  key_id = '55597ec93a98161f56e2af70e34cb0f88ea3029050d21bf4157d9f8a965431a5' 
  AND token = 'jmvLfTeXEpEP8l06YqqXeaLNMw9kMd6X2vdKAddOfX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}