Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf37131e37f9158c096e21f0d0722a399b64a1179a2c105b67ecbdd6868963ee' 
  AND token = 'CvhZ35cwnRbddKuDsgvNYI36EG+T3w1baQ/hi4aGJHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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