Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97df514658d53880dc840adcb48ebd5c2f818b04d24f2a446214123bad6b038e' 
  AND token = 'e/AVJx2+gGHAESs4Q5zzMJKClO+VM0EZQnt3SkeecI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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