Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c367618627f86d0847db9cf01bd726583500c5fd942366788f82f814f465f925' 
  AND token = 'Ihw5ehx5kkfm4jeSCuWxSBeTnwmbTKpfYGjPccxeiUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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