Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e34674876975bd26737f7a253135c08ff447063e68419aabc7d20ec6720e4ed0' 
  AND token = 'FPazkTzY9G9E7cHwKMRDY9ENUgNE1/FvPgNsMv1/Cyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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