Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cfa75fc1cea977d9dbab5a93484d6087e2a348e918a8aeb2f1cfc300a4500b6' 
  AND token = '2oP07SASHAaMpEXKTtM4mwzzlU0YhCRpAaafD1gQ9tM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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