Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36c72602664811d871c9233abc9ec873f04ec0572895c85c3c12a0e6e27c3fbc' 
  AND token = '2FJfujizA/5LBj7MUDrmR2z59neY33fSMNFHMPE/BiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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