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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '956328c9ab11e3bcb552c0cf7751cfc8d484bf17f06cc0a6c33f3499940ce2be' 
  AND token = 'WHUcN9nCfz+Ozr+tujfL77JcHwr6lkWVZZgaCDlOhsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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