Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f5d03740bfe2767c61c1b1c6e4f7becd8fffb43b015e36b57bacc71bc8c71a7' 
  AND token = 'cZQhdvq0Ke87CVr21GFer791M+bY/q9Ly3987mG4C5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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