Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db7ac942825fc2f4bc8b0051fa6c862f0f320edaf011c49f70aaf79edc98f783' 
  AND token = 'nCvON4YGARXelZF/wHEWXeMwG+XhpBXZDo0aGsjSbkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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