Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe2f3787173dbf733c7efe446540a0e90e6b2e50c9e95d408386850d48257c39' 
  AND token = 'bJjm9l4jzpQzNKFDLi+4kPI8/PUURGwzd/cmLeRX6Zk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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