Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c735ff0e1f96b225fec4d6d409b915f2844026763f7b58bc7bc213efb07802a' 
  AND token = 'tooWShlq3Hf4fS6CElcuk3z97SPhhCIHLRjpxVEogZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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