Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8f9f82aa543db376e3f4ecb8ff1bdb2a9ec674cbd9dae90c9234bd3604d5fa8' 
  AND token = '2AQxJqQHOkAaufd9zlXE76l7D0uJeul8ecdFavqQ6So=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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