Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b423f91a7c9761bb3302874e092e21c5264dd073a9b26bd13b163cb273634095' 
  AND token = 'Dc7Q868UhVhBf1fWXRWOjQlR9H53o2PZT5RC7CsOFXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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