Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecc317826bbfaf05384d7bf277e64fca12fddb1e68f2872bc6d569e0a1062382' 
  AND token = 'K8/iRpXa4A0xD0RTFV1RTlRNb+cjp1iciFNly4+5yDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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