Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3657cf1d922e75348b4754aaa17fbc6c71fccd42ab63a4292a80852e0ab2ab22' 
  AND token = '/bcwiaCffh/iJYP0guW/B2tXdlQlhiYZAPJgYODNfSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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