SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '059d7cf9f9f6054ccaac63c54a98f4f8755b46a48e4a234e817817bae73ba83f' 
  AND token = 'GJwfYzOfPZR6VvoGI4nQ8XboTjjarAq2/3JTRBbUPx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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