Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fa4fa174c3621feabe32230239d9e1880450b565f20b621cbf1722b89faa1f5' 
  AND token = '8UQnpdQYkYJWi8kxlqRMFMBYGz266JBRGzEIVUbpkIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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