Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cb385aa77600523ff70c0a661c71a3ad8abfc4e924cd8fffc79964c9542f1ba' 
  AND token = 'q0DwnecEgSHAQmOstr6BS67rgFrwUqgl00nE4xX5pU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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