Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03867a43b79129172a0511291881b6604dcdceacb6282988229f73b266f32c07' 
  AND token = 'YpOk8HD9V0c1+e5587zp7+g3dI6dOqatB4KUvySwx8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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