Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bad334fb562084ab86c2b4431b99255c879b86d25d927b447dda5c3eb98f944e' 
  AND token = 'Gk1Ie3xKsaWxzK8mHaweGi0N3VZqkW+Nm3bYNQAyRwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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