Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '097dc112a365dc2a00a1bd9555d4efaf932ed7a788367e79eaf8a82f529d8241' 
  AND token = 'WAu5hFc0BZZsG0EF2xgfDHVQaMFp6veSTI1bf7AL1Pg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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