Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae96d1ea9a3a79d5d641544ab5fba048cbbea89a01f9fd7c2f4bc68a5355895c' 
  AND token = 'wH2s71VD/HsrXpB0dGV/zXVcDSrPmTpc3MrPTfor7Ts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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