Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac7da50cc232d9cfd14fbac8e79221c2ca2d5eac4fedeb477ffe0ea24e4e925e' 
  AND token = 'Dt6ux+eH74rZPWICw8VOCEPOt59P3uJc+CWq91U67wo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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