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SELECT 
  1 
FROM 
  ushop_lock_keys 
WHERE 
  key_id = 'b1e41b08f96979df46fd6018be202f6d3ac177aac202d26fea9b48bc1eff638d' 
  AND token = 'UiZTnXQlN2mOy7rIkFXci+SXekyaVfisHalLVe6RX/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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