SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '92f8e19cf9a38bf43944ae0865db81e91aad2570c0d5f81c79d4da9ec00544b1' 
  AND token = '0h011vc3ZVwgtrEwkAUKhagv6XzX+/D7CmoRXKXu8+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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