SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f5581f98f2ed6b6e36085e1b4e4d9cee9fb18772af01c89ea6be1515f526148e' 
  AND token = 'BgmJZkMnUSPHTzmG1SQ7y7jqpnlw1rYXlEviA6CGa8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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