Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07e8ec0fc65dc87f1938cfb8aeb4af60cc0b85b4de5628a0b228c63f881c6c96' 
  AND token = '5/ASOjgqAxL/ZRK9cPubHRqLAbHvThh6jkX+F7fM5Qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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