Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '598a7572cab9b73fdb054f819959ef11c37abab99f649a2b0825d4cdd21690f7' 
  AND token = 'JXXZJR5V/BBle5U09HZ7lDg32NbKFj0n0tybmCand/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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