Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a570857a65a6a218f3862fe246edb81465eb608fda106f44e8e3365caff13cb' 
  AND token = 'yhRmKFT1IO90ouM+wvMiOZMTYOsHi0bWlqr9832Pb4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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