Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '454859263fe5a5f0de0c466b5b2abac4faeb486e4f55ac35b3527f38cb3481bf' 
  AND token = 'R0mauopPZ9iBs/cn6KgHNRuQ7OB3G+nzUeoEmvJf2vQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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