Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab2d65bbe50449df31a516d66359b8ade512c3fa16207690b8fdc5740d70cf45' 
  AND token = 'I0pt4ZaLkUFd/3a5uaGal0UD3X0ld1Lm+OdrWHvUAAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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