Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9729177ecc55dc201aa4ec36759c636b58ded86f59b2fb1944f926680ed95770' 
  AND token = '8xW1HMPXHPPNV3f3EQitsIctwICTlEWCLHWHRQiAMf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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