Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '549be7aa1121ba25460d8b744804e4a8a8b5239ad57117a2f1328f813b22d14a' 
  AND token = '16eYjXClMEF9ltMONKfaL8Uq02pRMMBE2KlOyaC2xHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00073

JSON explain

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