Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75fb901d83445dff1a4ce210825a4c8967170b689a1e82ff797ce1cacddd8fb3' 
  AND token = 'ckn0OtFM4NDDZgZCgxRtDLCkM7ojJgQqESecHuS5Do4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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