SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e4823cc43afdcfab944736342963392f97745498003bf582b14051570666498' 
  AND token = 'g3LJ0yPiZPHFw4QYhpXZy5pi0C6PlgeKXDruQS+iK0E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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