Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e08236f569d15fc2440e7000e04f408899a5d2ae9cd4a55cc611e654e939de3' 
  AND token = 'WK6Vs5JHvSpdSQhsaASrCstxblKfAKy19ih0yxTv0cA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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