Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '675bbb82b517716dd1b65d0e2856ff0df2904848bd8be900d0da6ee4ef578d44' 
  AND token = '2Wow/JA2xi1qj134ohq4wKALsuZ6aUA62yqspshnwUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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