SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2bff46a9bad5bbc193742c42491dd926eb770ab7c68edb7982cf6f74e90245e' 
  AND token = 'rPHVjlZ3gPWME1YXj4v37pBbwlw/n3gDTFVdrseBBjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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