Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '164e83be16881e3c59318779292c9ea1eaa0fd5ef6355bdf4f5998aa55840d06' 
  AND token = '4YTSVVYtErsEDFyXKc/M1gv6qeiZH0CrC8qPFAsRMEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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