Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25b05ef754ddc2aba586a6ad93b18b362c206e7d562d70c3e4377e5421ff299c' 
  AND token = 'b9oh0/s4xsL14xCQTuF58Ptp1z+cuDsIORMq6bmWJ30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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