Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c00ca2ee51de3fec077ac4dc2d080de6d268d4fbb86bcc5c4d876f90c062efcb' 
  AND token = 'dO9Jj2cDysWWswVt3irXyAjgeTt3zZQLkZnzbAezugM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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