Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0a21f758111a794c081bcb9d2129163194be8dcbe0f84db78a802fd2c8786120' 
  AND token = 'ESIuK0dpuS3AkNBSrSf0pBge7FeLovRFJQSd62CM8zU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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