Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dce89ac9d6fa79ba7be450a6d0f64255ebebc221c4fcbced3e7c7c6372d09a31' 
  AND token = 'DROdPg7NjbTlxobH31jy/SCZlNu3+79aOU9BxCLBpFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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