Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc3c0010fed84fcd5fd8c7f5c35e1753688894a71cbc619ecc59805a630beaf6' 
  AND token = '04Lar1gaZCS4X3xwMQR3H3p7SNGmajrH98PDNhwF9kQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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