Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3ea2776c84e82a4a63e24ce264a817de47ba93b97ae3d0694ea709656aee7f4' 
  AND token = 'uzOmFFLExLVbkUiD7yVoTSVDyPJx51mKBY8fDjL00Mc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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