Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dd37c6b32c611bf3602f2ad10f2358ade35c59aac0cffcc1afa1904b286f876' 
  AND token = 'JQXMg1Hkonj7HlYr2ZdTam2bJfostAxIv4MYEYACtmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00111

JSON explain

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