Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36d8ee95e0b1a754eaa2cbbeddb7c1ba8d502d23cb77d631798cb495018e834a' 
  AND token = '5iSDXXXs0TyopHAdl9GAbFZ1hyOfYqZPOwvkbEz3ufg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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