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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cf2d33492fb8c010eff0d46d76b20441d0f29445aafe5ebce26cee43f0ead05' 
  AND token = '05A8lG1o3jSYDg/s950j2N+kyUEoK0M0J4WURbs8eFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}