Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06b192b264b6c7eae2333bf35aded6440a0086f2290a3c90a37b65fbfd854f23' 
  AND token = 'YWiCOyC1V6ws8UYD1VyfjxaV03uqckdba2gmPn3iG98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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