Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9405028190a303d8219d854d8318e6bc431b81e4492efe23bebcd4746437e070' 
  AND token = '4KUyUxUhFsy0VdeMzWb7TA/UfpBlwfFjJsbejjRM4fw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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