Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e18fd68a025c433cd2530a46fb7e84d5833c1ec99057b726a127dfa199926e93' 
  AND token = 'HgH341gYqNabCd4+unNQKCFddX/VM5SU2GxtKiVkNVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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