Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13f3ff47036a79fe86ebd31ca9b32bf93bc512db22905cb29e5fa937ef1ae268' 
  AND token = '4OAslDHuboiC7B7UcJXW7a3X89cXVfU25PeV9wovMvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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