SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd105b629e9d20914741a8ff487cebc091b6d78ae9667d2f62e9b8e558d03fe4b' 
  AND token = '6hw6luLBgao/rsb3A/rGQWODZrqqa+g+XzkiEgX++aA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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