Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7a9d6c14d0ef0768fe17150319d67c5eb002aed739c0817a80c53060d906ef7' 
  AND token = 'DByVxRfVo2aeXykYH7oDFqXy5RjwG65L+sRDlEG6SPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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