Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c4f6b728b354c938556952ce84d284352404fb2c1b15dc19eadd10f5a7671f4' 
  AND token = 'FKySWvNNiVkn2Y8f79AeJktbk/dZIRVwrsk3ux5IBW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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