Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09b09ba46c201e8f09c717108319700f40df947a698e9434a156814dcecd0878' 
  AND token = 'sblWgBxRMzv3YzmQmbHgbJqgwKZizBohfm5mCxlxct0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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