SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e6af54de550175cab85f458f0c2fdeb47e7d432e7f3d403d3c029a6a9d2e8c46' 
  AND token = 'DWEX7KPq1HaZI2jZj9xAUTTWh5jNTHS7KQNm8AuzJ+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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