Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b5b95c5870083dbcf625b7fb5d7bda8ef5063ddbb85c3ca751b676060988bd9' 
  AND token = '5AA9/3I4tSdXANXaB8i7zL76O8uCHAWYSVDPl5c9v8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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