Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58d378688f2ca7593bcc05b8fd50af5f356f90dc57934b2389e513db336b7be0' 
  AND token = 'JnxSPoAguO/bRQXFe5/XsoQuUNK4qocnDWAufH5nzoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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