Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66a33dca203c3422c4436c360642824d602acda3f7f548c87e90fdcee4e38718' 
  AND token = 'rAb1Yc1yd6gGU25/K4R+MSGcsOO4yZnWcI0FYj1EAr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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