Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '717dc52f016a8713294a2126acc6cbdf56c97db3719774e07eee577f7f4d586a' 
  AND token = '4qKLBVH4OeoqWMJgp3c3ovr3vgYkmcnmgORwiy8zPAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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