Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f9f7de070098372c47351ee8318227ce8d66f74c198c812041452f53954c88c3' 
  AND token = 'oAuXp+WwXgPNjn29sH3gXIdU91QjxD1G37lILfuQZq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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